Tuesday, January 26, 2010

99% Uptime What it means in actual units of time

What are the timings involved in calculating above 99% uptime for any system?
Defining time in a common unit of seconds we have,
1 day
=
86,400
seconds
(24 Hours)
1 week
=
604,800
seconds
(7 Days)
1 month
=
2,592,000
seconds
(30 days)
1 quarter
=
7,862,400
seconds
(91 days)
1 year
=
31,536,000
seconds
(365 days)

Here are a few pointers.
Maximum allowed downtime
Days:Hours:Minutes:Seconds
99%
99.9%
99.99%
99.999%
99.9999%
99.99999%
1 Day
d:h:14:24
d:h:01:26
d:h:m:08
d:h:m:s
d:h:m:s
d:h:m:s
1 Week
d:01:40:00
d:h:10:04
d:h:01:00
d:h:m:06
d:h:m:s
d:h:m:s
1 Month
d:07:12:00
d:h:43:12
d:h:04:19
d:h:m:25
d:h:m:02
d:h:m:s
1 Quarter
d:21:50:00
d:02:11:00
d:h:13:06
d:h:01:18
d:h:m:07
d:h:m:s
1 Year
03:15:00:00
d:08:45:00
d:h:52:33
d:h:05:15
d:h:m:31
d:h:m:03

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